Acorn Naturalists' Compact Student Binocular (8 x 21mm)

This excellent, reasonably priced student binocular combines high quality, clear, rugged optics in a compact, easy to pack design. Weighing only 7 ounces, the binocular features fully-coated lenses that offer a field of view of 365 feet at 1000 yards. This binocular is ideal for group use or for taking along on hikes when weight and size are considerations. The binocular includes a pouch, strap, and lens cloth.

What do those binocular numbers mean? Most binoculars are described using two numbers: this binocular is 8 x 21. The first numeral refers to the magnification, or “power.” An object seen through the binocular will be magnified eight times the size when viewed by the naked eye. The second numeral refers to the diameter of the objective lens, which is the end of the binocular facing the object to be viewed. The larger the numeral, the greater the diameter of the lens, and thus the more daylight entering the barrel of the optic to illuminate the object. Generally speaking, the higher the number, the bulkier the binocular. This compact version has a 21mm lens. Binoculars are also described by “field of view.” This model’s field of view of 365 feet at 1000 yards means that when you are viewing objects 1000 yards away, you will have 365 feet of horizon in your field of view.